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(No Model.) 2 Sheets-Sheet 1.

T. 0'. WOODWARD SEWINGMAGHINE. 0- .7 3- Patented Dec. 5, 1882.

N. PETERS. Pholo-Uthognpllcr. wnhiiu to 'n c.

(No Model.) '2 Sheets-Sheet 2'. T. 0. WOODWARD.

SEWING MACHINE. No. 268,763. PatentedDec. 5. 1882.

Vivaldi/5%: I Ina @7120? UNITED STATES} PATENT OFFICE.

THOMAS C. WOODVVARD, OF NEW YORK, Y., ASSIGNOR TO ELIAS A.

\VILKINSON, TRUSTEE, OF NEWARK, NEW JERSEY.

a SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 268,763, dated December5, 1882.

' Application filed September 8,1882. (No model.)

7 To all whom it may concern:

tturning it with the treadle or otherwise in an automatic manner.

In the form of construction shown the beltwheel or driving-wheel A has acontinuous oblique belt groove or track, B, and a straight switch grooveor track, 0, leading therefrom at D and terminating at E, the oppositepart of the belt-wheel between these two points,

that would be embraced by a continuation of the switch-groove, being cutaway, as shown, forming an offset, F.

To illustrate the operation of the belt-wheel, it is shown on a journal,G, connected by a belt, H, in the oblique belt-groove to a beltpulley,K, on ajournal, L, the journals being fastened in a support, M, having abelt-guard, N, with a belt-groove, O, opposite to the switchgroove. Thebelt-wheel is shown with the belt in position, and adapted to be turnedby the crank P from right to left, in the direction indicated by thearrrow, to keep the belt on in the oblique belt-groove, and to turnbackward or in the opposite direction, to run the belt into theswitch-groove and otf. Then the belt is run off the switch-groove it hasa slack, R, in the offset, and drops into the belt-groove in thebelt-guard, which permits the continued backward motion of thebelt-wheel. By having no belt-groove in the belt-guard the backwardmotion of the belt-wheel will be arrested by the clamping of the beltbetween the two. 'When the beltis off, by turning the belt-wheel in theforward direction the belt will take the switch-groove and run on, andwhen it is on, by turning the belt-wheel in the backward direction itwill take the switch-groove and run off.

The belt-wheel is peculiarly adapted to sewing-machines, in which it isfrequently necessary to slacken. the belt on the belt-pulley on thedriving-shaft L, to turn the head of the machine sidewise, to fix or oilthe under works. To accomplish this the belt can be run oh thedriving-wheel and slackened by a backward motion of the treadle Y, andwhen the head of the machine is in position again the belt can be run onagain by a forward motion of the treadle, thus avoiding the unpleasantoperation of removing or replacing the belt by hand, or both, or ofapplying a belt-shifter by hand for the purpose.

The details of construction and operation may be varied within the scopeof the improvements. For example, the belt-wheel or driving-wheel maybemade in skeleton form,with any kind of a belt-track and switch-track;the form and application of the belt-guard may be modified, and thebelt-wheel may be used for other purposes than that referred to herein.

I claim as my invention 1. The combination, in sewing mechanism, ofdriving-wheel A,having belt-groove B and switch-groove G, belt-guard N,having 1 beltgroove 0, belt H, treadle Y, and driving-shaft L, havingbelt-pulley K, substantially as set forth.

2. The combination, in sewing mechanism, of a driving-wheel 'having anoblique beltgroove and a straight switch-groove therefrom, a belt-guardaround the lower portion of the same, and having a belt-groove oppositethe switch-groove, and a belt from the drivingwheel to a belt-pulley onthe driving-shaft,

substantially as set forth.

3. Thecombination, in sewing mechanism, of a driving-wheel having abelt-track and a switch-track therefrom, a belt-guard to keep the beltin proper relation tothe tracks, and a belt-from the driving-wheel to abelt-pulley on the driving-shaft, substantially as set forth.

4. The combination, in a sewing-machine, of adriving-wheel having anoblique belt-track and a straight switch-track therefrom, and supportingand operating mechanism, substantially as set forth.

5. The combination, in a sewing-machine, of a driving-wheel having abelt-track and a switch-track therefrom, and supporting and operatingmechanism, substantially as set forth.

6. The combination of a belt-wheel having an obliqnebelt-track and astraight switch track therefrom, with a belt-guard around the lowerportion of the same, and having a beltgroove opposite the switch-trackto keep the belt in proper relation to the beltwheel, a beltpulley, andsupporting and operating mechanism, substantially as set forth.

7. The combination of a belt-wheel having a belt-track and aswitch-trackrtherefrom, a belt-guard to keep the belt in proper relationto the track, and supporting and operating a mechanism, substantially asset forth.

' S. A driving-wheel having a continuous oblique belt-track and asegmental straight switch-track therefrom, substantially as set forth.

911A beltwheel having abelt-track and a switch-track from thebelt=track, substantially as set forth.

10. A belt-wheel having a switch-track to throw a belt on when the wheelis turned in one direction, and to throw the belt off when the wheel isturned inthe opposite direction substantially as set forth.

11. A belt-wheel adapted to throwabelt on and retain it when the wheelis rotated in one direction, and to throw the belt 011' when the wheelis rotated in the opposite direction, substantially as set forth.

In witness whereof I hereunto subscribe my signature in presence of twowitnesses.

THOMAS C. WOODWARD. Witnesses:

E. E. MASSON,. W. B. MASSON.

